4. SPM Toolbox

The SPM Toolbox is still under development, please consider using the R-package instead, or contact Tamas Spisak (tamas.spisak@uk-essen.de) to get notified about Toolbox release.

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Usage of the SPM Toolbox

1. Start pTFCE SPM Toolbox from the SPM "Toolboxes" roll-down menu.

2. Select the SPM.mat of your previously estimated analysis.

3. Select the contrast you want to enhance with pTFCE.

The pTFCE SPM Toolbox will create a new contrast item having the same contrast weight as the original but enhances the statistical parametric map.

3. The probabilistic threshold-free cluster enhancement is performed in about 30-60 seconds.

4. Visualise the enhanced contrast (ending with pTFCE) with the "Results" button in SPM, as usual.

IMPORTANT NOTE: Since the pTFCE enhanced image already encompasses cluster information on the voxel-wise level, the table of cluster-level statistics generated by SPM do not apply after pTFCE correction. The Peak-level statistics are still valid (and incorporate clustering information).